Comment 3 for bug 361733
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| Timothy Miller (theosib) wrote Re: fakeRAID and software RAID are two different things | #3 |
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Hi,
I stopped using Ubuntu some time ago, since it's still not possible to boot from a software RAID volume. (The initrd does not load the mdadm driver at boot time, so I have to use other distros if I want my root volume to use software RAID. I reported this bug in launchpad, but it's never been addressed.)
However, looking at the source code to 2.6.33, it appears that the same block drivers are still there. There are separate RAID1 implementations for "dmraid" and "mdraid". Although this is not an Ubuntu bug per se, it is definitely a Linux problem that affects Ubuntu and Ubuntu users.
The consequence of this is that people trying to set up software RAID won't know which type to choose. If they chose dmraid, they'll get poor read performance, since it doesn't do load balancing.